Declension table of pattraka

Neuter	Singular	Dual	Plural
Nominative	pattrakam	pattrake	pattrakāṇi
Vocative	pattraka	pattrake	pattrakāṇi
Accusative	pattrakam	pattrake	pattrakāṇi
Instrumental	pattrakeṇa	pattrakābhyām	pattrakaiḥ
Dative	pattrakāya	pattrakābhyām	pattrakebhyaḥ
Ablative	pattrakāt	pattrakābhyām	pattrakebhyaḥ
Genitive	pattrakasya	pattrakayoḥ	pattrakāṇām
Locative	pattrake	pattrakayoḥ	pattrakeṣu

Compound pattraka -

Adverb -pattrakam -pattrakāt